photoelectricity

Etymology tree
Proto-Indo-European *bʰeh₂-
Proto-Indo-European *bʰéh₂os
Proto-Hellenic *pʰáwos
Ancient Greek φᾰ́ος (phắos)
Ancient Greek φῶς (phôs)
Ancient Greek φωτο- (phōto-)der.
English photo-
Ancient Greek ἤλεκτρον (ḗlektron)bor.
Latin ēlectrum
Proto-Indo-European *-ikos
Proto-Italic *-ikos
Latin -icus
New Latin ēlectricusbor.
English electric
Proto-Indo-European *-teh₂
Proto-Indo-European *-ts
Proto-Indo-European *-teh₂ts
Latin -itāsder.
Old French -itebor.
Middle English -ite
English -ity
English electricity
English photoelectricity
From photo- + electricity.